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NEW YORK—The United States will increasingly be turning to companies that can cut electricity waste—and generate cleaner power with nuclear reactors, natural gas-fired plants, wind turbines and solar panels—in response to the Obama Administration’s proposed new carbon dioxide limits.

The proposed limits will likely help the biggest U.S. natural gas producer, Exxon Mobil Corp., by increasing demand for its fuel, which emits half the carbon dioxide as coal.

Last year 78 per cent of carbon dioxide emissions from the electric power sector came from coal.

Electric customers will almost certainly pay higher prices, according to several analysts and industry experts, though efficiency measures could reduce the impact of higher prices on power bills.

The Obama Administration predicts power bills will shrink as a result of the rule.

The proposed rules, announced this week, would require a 30 per cent reduction in carbon dioxide from the electric power sector from 2005 levels by 2030.

The rule isn’t scheduled to become final until next year and it will likely face extensive political and legal challenges.

If the rule goes through, states will have until 2018 to develop their own plans to meet the new targets.

How each state decides to do this will determine how much it will help or hurt customers, power companies and others who supply fuels or technology to the industry.

Some states will likely set up or join an existing scheme that caps the amount of emissions from the power sector, but allows power companies to trade emissions permits with each other.

These cap-and-trade programs have the effect of increasing the value of low-carbon and carbon-free power.

Other states may instead require big improvements in energy efficiency or heavily subsidize renewable power generation such as wind and solar.

The impact of the rules, though, may be less than advocates and opponents say.

Emissions have fallen so fast since 2005 that the country is already nearly halfway to its goal.

Separate clean air rules are expected to have a side effect of reducing emissions by another five per cent by 2018.

That will leave the country 12 years to reduce emissions by another 10 per cent, an amount Bernstein Research’s Hugh Wynne calls “eminently doable.”

Winners

Nuclear generators. If carbon-free power becomes more valuable to the marketplace, no one will benefit more than nuclear power producers such as Exelon, Entergy Corp., Public Service Enterprise Group and First Energy.

Natural gas companies. Companies that produce natural gas, such as Exxon and Chesapeake Energy Corp.; or deliver it, such as Spectra Energy Corp. and Kinder Morgan, Inc.; or produce power with it, like Calpine Corp., could benefit. Bernstein Research estimates that a 10 per cent reduction in carbon dioxide emissions could lead to a 12 per cent rise in U.S. natural gas demand.

Renewables. Companies that make wind turbines or solar panels, or develop or operate wind and solar farms, could benefit a couple of ways. States may encourage or subsidize construction, and clean power may become more valuable in the market.

Electric technology companies. Companies that help make equipment and technology that helps the grid deliver power more efficiently or helps customers reduce their power could benefit. Those include ABB, Honeywell International, Inc., Schneider Electric SA, Opower and Silver Spring Networks.

Losers

Coal miners. U.S. coal production has declined in recent years, especially in higher-cost regions such as Appalachia. A 10 per cent reduction in carbon dioxide emissions will mean a decline of 180 million tons, or 18 per cent, in U.S. coal production, according to Bernstein Research. That would hurt miners such as Peabody Energy Corp., Alpha Natural Resources, Inc. and Arch Coal, Inc.

Railroads. U.S. railroads depend on shipping coal for a significant percentage of their revenue. If utilities use less, railroads will ship less.

Coal generators. Companies such as NRG Energy, Inc. and Dynegy Inc. that generate electricity with coal-fired powered power plants in unregulated markets may either have to pay for power plant upgrades or pollution allowances, which would reduce profits.

Electric customers. Power prices and power bills are influenced by many factors, but environmental regulations tend to push power prices up.

Toss-up

Regulated electric utilities. If, as expected, regulators allow utilities to charge customers for new equipment and technology needed to reduce emissions, regulated utilities that now rely heavily on coal could benefit. Among them: American Electric Power, PPL Corp., Ameren Corp., Southern Company and Duke Energy. But if the price increases are too extreme, customers would consume less electricity in response and the companies could lose revenue.

Unregulated electric utilities. As coal plants close or reduce their output, the lower power supply could lead to higher prices and revenues for utilities that sell power into competitive markets. However, if states help customers reduce demand for electricity with efficiency programs, or encourage the production of renewable power such as wind and solar, that could lower wholesale power prices.

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